The Sonoma County Trails Challenge is an invitation to discover your Regional Parks.
Download your 2018 Trails Challenge guidebook
(PDF: 4.63 MB)
Hike, run, bike or ride at least 5 featured trails anytime from June through September and get a Trails Challenge T-shirt! The guidebook presents trail notes for 15 parks, turn-by-turn trail directions, maps, and suggestions for themed hikes, including an all-park challenge of more than 50 miles.
Share your trail photos on social media with hashtags #SonomaCountyParks #TrailsChallenge, and you'll be eligible for giveaways of park memberships and REI trail gear.
Note: Trails Challenge T-shirts are temporarily out of stock until Sept. 20.
Trails Challenge Sponsors